RC5-32/12/7 Challenge Won (56bit RC5)
Wednesday, October 22nd, 1997The 56bit RSA Labs RC5 partial known plaintext attack challenge has been completed successfully in 265 days by Distributed.net a grid computing project. The active search time is 212 days. At its averaged rate the project tested 5.3 Gk/s (giga keys a second).
The official Dnet announcement includes more information.